Method for preparing methyl cellulose ether with arundodomax dissolving pulp serving as raw material

A technology of methyl cellulose ether and dissolving pulp, which is applied in the field of preparation of methyl cellulose ether, can solve the problems of increased production cost of cellulose ether, increased burden on enterprises, high equipment cost, etc., and achieves remarkable environmental protection effect and reduces The effect of waste liquid and small investment

Active Publication Date: 2014-02-26
新乡市东升新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of my country's national economy, the demand for cellulose ether continues to rise, mainly used in construction, papermaking, food, medicine, petrochemical and other industries. Due to the rising price of cotton used in the production of cellulose ether, cellulose ether The continuous increase of production costs has increased the burden on enterprises
[0004] At present, the main raw material for the production of cellulose ether is cotton. Although there are patents introducing the method of using wood pulp or bamboo pulp instead of cotton to produce cellulose ether, the expected purpose has not been achieved due to harsh reaction conditions and high equipment cost.

Method used

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  • Method for preparing methyl cellulose ether with arundodomax dissolving pulp serving as raw material
  • Method for preparing methyl cellulose ether with arundodomax dissolving pulp serving as raw material
  • Method for preparing methyl cellulose ether with arundodomax dissolving pulp serving as raw material

Examples

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Effect test

Embodiment 1

[0052] 1. Method for producing methyl cellulose ether from reed bamboo dissolving pulp:

[0053] (a). In 100 parts of 95% ethanol, 10 parts of sodium hydroxide, heat to dissolve the sodium hydroxide, add 20 parts of Arundis dissolving pulp powder, stir and alkalize at 20°C for 3 hours to make sodium cellulose .

[0054] The particle size of Arundis dissolving powder is 200μm;

[0055] The parts by weight of components are:

[0056] 100 parts of ethanol with a volume concentration of 95%

[0057] 20 parts of Arundis dissolving powder

[0058] Sodium hydroxide 10 parts

[0059] (b). Add an etherification agent to the cellulose sodium, and in the presence of the combination catalyst, etherify at 45°C for 2 hours, then separate the reaction liquid and recover the combination catalyst, and use a weight concentration of 95°C Soak 100 parts of 1% acetic acid solution for 30 minutes, then remove the acid solution with a centrifuge;

[0060]

[0061] Described etherifying agen...

Embodiment 2

[0086] 1. Method for producing methyl cellulose ether from reed bamboo dissolving pulp:

[0087] (a). Add 15 parts of sodium hydroxide to 100 parts of 85% ethanol, heat to dissolve the sodium hydroxide, add 30 parts of Arundis dissolving pulp powder, stir and alkalize at 40°C for 2 hours to make sodium cellulose .

[0088] The particle size of Arundis dissolving pulp powder is 300μm;

[0089] The parts by weight of components are:

[0090] 100 parts of ethanol with a volume concentration of 85%

[0091] 30 parts of Arundis dissolving pulp

[0092] Sodium hydroxide 15 parts

[0093] (b). Add the cellulose sodium into the etherifying agent, and in the presence of the combined catalyst, etherify at 45°C for 1 hour, then separate the reaction liquid and recover the combined catalyst, and use a weight concentration of 95°C as Soak 100 parts of 0.5% sulfuric acid solution for 60 minutes, then remove the acid solution with a centrifuge;

[0094]

[0095] Described etherifyin...

Embodiment 3

[0119] One, the method for producing methyl cellulose ether from reed bamboo dissolving pulp, by the following steps:

[0120] (a). Add 12.5 parts of sodium hydroxide to 100 parts of 75% ethanol, heat to dissolve the sodium hydroxide, add 25 parts of reed bamboo dissolving pulp powder, stir and alkalize at 30°C for 2.5 hours to make sodium cellulose .

[0121] The particle size of Arundis dissolving powder is 250μm;

[0122] The parts by weight of components are:

[0123] 100 parts of ethanol with a volume concentration of 75%

[0124] 25 parts of Arundis dissolving powder

[0125] Sodium hydroxide 12.5 parts

[0126] (b). Add the cellulose sodium into the etherification agent, and in the presence of the combined catalyst, etherify at 45°C for 2 hours, then separate the reaction liquid and recover the combined catalyst, using a weight concentration of 1 at 95°C 100 parts of acetic acid solution soaked for 45 minutes, then removed the acid solution with a centrifuge;

[0...

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Abstract

The invention discloses a method for preparing methyl cellulose ether with arundodomax dissolving pulp serving as a raw material. The method comprises the following steps of: adding arundodomax dissolving pulp powder into a mixture of ethanol and sodium hydroxide, and alkalizing the powder and the mixture to obtain sodium carboxymethyl cellulose; adding etherifying agent in the sodium carboxymethyl cellulose for etherifying with a combined catalyst, and then collecting reacting liquid, and soaking the reacting liquid through acid solution, and centrifugally separating the reacting liquid to remove acid solution; washing the liquid through water, and removing moisture in the liquid; and drying the liquid, and then crashing and refining the liquid to obtain the methyl cellulose ether. According to the method disclosed by the invention, the existing and conventional technology for producing the methyl cellulose is changed, a combined catalyzing method with solid base is introduced for etherifying, therefore, the temperature in etherification is lowered, the etherification time is reduced, the corrosion on production equipment is reduced, the energy consumption is reduced, and waste liquid produced in the production process is obviously decreased. The method requires small investment, is simple in technology, is particularly suitable for serving as a processing technology in a producing area of the arundodomax, and provides new raw materials for building motor and papermaking.

Description

technical field [0001] The invention relates to a method for preparing methyl cellulose ether, in particular to a method for preparing methyl cellulose ether by using reed bamboo dissolving pulp as a raw material. Background technique [0002] Reed bamboo is widely distributed in my country, from Liaoning in the north to Guangxi in the south, and the most produced are along the seawalls along the river. Reed bamboo has played a unique role in improving the environment and preventing floods and collapses. At the same time, reed bamboo grows fast, has strong adaptability, is easy to reproduce, and has good economic value. However, due to the influence and restriction of various factors such as environmental protection and unbalanced economic development, the comprehensive utilization of reed bamboo in my country is still at a low level, and a large amount of reed bamboo can only be used as fuel, which has not exerted its due economic value . Therefore, using the growing envir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B11/02C08B1/08
Inventor 施晓旦郭和森
Owner 新乡市东升新材料有限公司
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